<DR033>
Requirement that doesn't preclude UI interactions but should not define that
UI.
Issue (i.033.01):
Do things put in XP should be human friendly or should it be possible to use
more human friendly or allow interaction with human.
</DR033>
I think the original motivation for this requirement was to allow messages
to be sent to devices and have those messages drive some UI.
Vis issue i.033.01: I think that should be a separate requirement. Perhaps
introduce something like <annotation> from XSD.
Comments?
Alex